Net Annual Change in the Surface Storage

A 400 hectares sub-catchment receives 1100 mm annual rainfall and generates 600 m3 of average daily runoff from the sub-catchment.

If there is no water flow into the sub-catchment, what would be the net annual change in the surface storage, considering evapotranspiration and infiltration as 42% and 36% of precipitation?

Taxonomy

• Flowmetering
• Hydrology
• Hydrological Modelling
• Catchment Management
• Evaporation
• Surface Flow Analysis
• Hydrological Modelling
• Stormwater Runoff
• Flow Meters

1 Answer

1. since 10000 m^(2 )=1 HA ;
   (400*10000)*thus*area in m^2;
                               4000000
   area*times*length = volume;
                      area times length = volume
   (4*10^6*1.1)*total*annual*volume;
                                        6
                            4.4000000 10 
   considering*percentage*loses and adding*up;
              considering percentage loses and adding up
   36*loss*thats*total*percentage+42;
                                  78
   4.4*(1-.78)*10^6*what*is*left in the*bodie;
                                         5
                            9.68000000 10 
   total*annual*loss*of*run*off;
   (600*365.25)*what*is*lost in cubic*meters;
                                        5
                            2.1915000 10 
   (9.68-2.1915)*10^5*what*is*left;
                                         5
                           7.488500000 10 
   ` answer is 7.4885*10`^5*m^3;